Brake-shoe.



No. 879,969. I PATENTED PEB. 25, 1908.

L. E. KELLER.

y BRAKE SHOE.

APPLUATION FILED FEB. 27, 1907.

va i

LOUIS E. KELLER, OF OIL CITY, PENNSYLVANIA.

' BRAKE-SHOE.

No. erases.

Speccation ot Letters atent.

Patented'Feb. 2.5, inve.

Application filed February 27. 1907. Serial No. 859.590.

To all whom it may concern.;

Be it known that I, LOUIS E. KELLER, a citizen of the United States, residing et Oil City, in the county of Venango und State of Pennsylvanie, have invented certain new and usefullmprovenients in Brakehoes; and l do hereby declare vthe followin to beit full, electr, and exact description 0:' the-invention, suoli as will enable others skilled in the nrt to which it appertains'to make and use the same.

This invention relates to brake shoes, and particularly to shoes having a removable contact member. The invention comprises the production oli a shoe ,havingy a supporting portion connected to a suitablesup orting beam, and c contact portion remova ly secured thereto, the contact portion being made of different material from the supporting portion.

The invention 'further comprises the production of a contact portion for a brake shoe formed of cast material, a strengthening strip of steel preferably corrugated its full length, the cast portion being cast onto the steel strip and formed substantially integral therewith.

The object of the invention is the production of a brake shoe having a contact portion formed with a steel reinforcing strip that is not weakened at any point, and material enst thereon.

Another object in view is the production of a brake shoe having a contact member formed of n. portion of cast metal and a prtion of tempered metal, the cast inetal'being cast onto the tempered metal and formed substantially integral therewith.

A.' still further object in View is the production of a contact member, 'a brake shoe formed with a corrugated strip of tempered drietal, and cast metal cast thereon and' formed substantially integral therewith. With these and other objectsinyiew, the invention comprises certain novel constructions, combinations and arrangements of. parts as wlll be heremafter more fully described and claimed.`

in the accom enying drawin s:-Figure l'represent-s a si e elevation of a s oe formed according to the resent invention. Fig. 2 is a plan View ofv t 1e rear of a contact member Oia brake shoe formed in accordance with the present invention. Fig. 3 is e view of a tempered reinforcing strip used in con-- necton with the contact member forming per-t or the present invention. Flg. e is a side elevation of Fig. 3, the cast metal portion of the contactmember being shown in dotted lines. Fig. 5 is a section through 'Fig 2 on line 5". Fig. 6 is a. vsection -60V thron rh Fig. 2 on line 6 6, the contact portion or the contact member being omitted to better disclose the shape ot the tern ered reiniorcing strip. Fig. '7 is a detail, 'ragmentary, perspective view oi one endl ol the ternt5 pered reinforcing strip forming part of the present invention.

ln the manufacture ofbralre shoes for cars, it has been found desirable to make the seine in substantially two parts so that the contact 7o or friction part may be removed end renewed-as occasion may require. ln making' brake shoes ci this character it has 'been found that the removable portion is very liable to breek unless made very heavy and ci' a more or less expensive materiel. Voirious means have been suggested 'lor reinforcing the contact member of brake shoes with varying success, and it is to this class of invention in which reinforcing means are provided for the contact member that the present invention reletes.

ln constructiirgl a brake shole, l have provided a metallic strip 1 of tempered material, preferably tempered. steel. "iihe strip 1 is 235 made of corrugated material ss clearly seen in the drawings. in providing this corin-A ygated strip, l preterebly stamp the same from sheet material, forming corrugations-on both sides ol the strip, or in other words bending the strip heeft. and torthl .the same has a wavy appearance incross sec4 tion. At the same stamping operation, if it is desired, ,the strip may be formed on the arc of a circle for conforming to the periphery ofV a car wheel when the seme is applied thereto. At each end of the strip I, l. slit the same at 2 and 3and turn the outside portions 4, end 5 outward and the portion. 5; inward. The portion or member is also bent for "forming le() s.' hooked extension 7 tier more readily end irmly grasping and holding in place 'the cast mcterial 8 atert-he seine' has been `ploced thereon. Theextensions or members t and 5 formstops for the ends @M9 of the support- MI5 ing part of the brake shoe 10. vositioned centrally of the reinforcing member l is a reinforcing strip 11 for reinforcing the sustaining'or retaining member 12 of the entire contact member 13. After the strip l has been v bent into the forni shown Files. 3 sind e and the reinforcing strip 'l hss ZAbeen pleced'in position as clearly seen in F ig. 6, metal, preferably of cast iron, is cast onto the lower surface of the member 1 as clearly seen in Fig. 1 and at the same time metal is cast around the reinforcing strip 11 asclearly seen in Fig. 6. During the casting operation, shoul ders 14--14 together with smooth portions 15-15 are cast on the ends of the metal strip. The space left vacant by the bending of the member 6 to the position shown in Fig. 7 is f filled with cast material so as to prese-nta l complete shoulder across each end of the contact member 13, The ends 9 9 of the supporting part of the brake shoe 1() are bifurcated, and the bifurcation is adapted to tit over the shoulders 14--14 and consequently hold the ends 9 9 from slipping laterally.

It will also be evident that the members 4 f and 5 will prevent the ends 9--9 from movt ing longitudinally. (.)n the supporting part l of the brake shoe 10 is formed supporting lugs 16 and 17 having perforations there-l through for accommodating a securing member 1t). ln assembling the contact member 18 with the member 10 the samey is placed in position with the ends Q-9 iitting against the members l and .3 and thc central portion i 12 titting between the members 16 and 17. The member 12 is provided withan aperture 2() which is adapted to register with the ap ertures in lugs 1 6 and 17 so that when the securing member 1) is placed in position, it*z will pass through the aperture 2() and consequently hold the contact member 13 'firmly against the ends llmtl. 'lhe contact member 13 being firmly held against the ends 9-9, and the ends J---.) being kept in position by the shoulders 1st--1-l and the members 4 and-y 5, it will lbe observed that the contact mem ber 13 is thus lirmly held in. position` rl`he provision ol' a reinforcing'strip, as 1, i being pressed into, a wavy contour forms a strong and durable meansl'or lirmly holding friction metal, as t5. in position. l'or at' all times operating in the. usual way. The Wavy or corrugations of the strip l l'orm a large surl'ace l'or the. cast metal to come in contact with, and all`ords wnsequeutly a greater holding means l'or retaining lhe'cast metal in its 'proper shape. The, use oll a corrugatet'l strip the lull width olI the bralie shoe greatly strengthens the shoe throughout its entire length and presents a shoe. that damage thereby.

by its peculiar construction, to hold the cast metal in osition even though the same should crac at any point. In shoes of this class that are at present being used it has been found quite often that the same will crack and either part or all fall down upon the track and in some instances cause much The provision of a strip,

as 1, for more or less iirmly holding the cast metal in position atall times, even when the same is cracked presents a structure that is desirable, and one that by its peculiar coliformation to said supporting member, and by reason of the said corrugations, imparts toughness as well as strength for preventing the breaking of the refrangible cast metal.

Having thus fully described my invention,

what l elaini as new and desire to secure by' Letters Patent is 1. A device ot the character t'leseribed. comprising a supporting member and aeon- Atact member, .said contact member eom prising ay iortion of east iron, a reinforcing strip for tlie same formed with Acorrugations on each side, said strip being the same width throughout-and having its ends bent for forming stops on oneside and bent on the opposite side for forming auxiliary holding means l'or the cast material, and a supporting member east integral with. said cast material and provided with a tempered metal reinl'orcingstrip.

2. 1n a device of the character described,

1 comprising a supporting member, and a conf tact member, said contact member comprising a cast l'rietional portion, a longitudinally corrugated reinforcing member of steel. the samewidththroughout its entirey length, l'or said l'rictional portion, and a retaining mem-- ber cast integral with said l'rietional member and engaging the sides of the reinforcing member.

ln testimony whereol' l allix m \vsignature. in presence ol' two witnesses.

LOUIS ll. lx'lllililllt. vitnessesz Fam) A. S'rncu,

Jonav .\l. )letun 

